package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
      //判断当前加入购物车商品是否纯在
      ShoppingCart shoppingCart = new ShoppingCart();
      BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
      Long userId = BaseContext.getCurrentId();
      shoppingCart.setUserId(userId);

      List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
      //如果存在，数量甲乙
      if(list.size()>0 && list != null){
          ShoppingCart cart = list.get(0);
          cart.setNumber(cart.getNumber() + 1);
          shoppingCartMapper.updateNumberById(cart);
      }else {
          //如果不存在，需要插入一条购物车数据
          //判断本次是菜品还是套餐
          Long dishId = shoppingCartDTO.getDishId();
          if(dishId != null){
              Dish dish = dishMapper.getById(dishId);
              shoppingCart.setName(dish.getName());
              shoppingCart.setImage(dish.getImage());
              shoppingCart.setAmount(dish.getPrice());

          }else{

              Long setmealId = shoppingCartDTO.getSetmealId();
              Setmeal setmeal = setmealMapper.getById(setmealId);
              shoppingCart.setName(setmeal.getName());
              shoppingCart.setImage(setmeal.getImage());
              shoppingCart.setAmount(setmeal.getPrice());

          }
          shoppingCart.setNumber(1);
          shoppingCart.setCreateTime(LocalDateTime.now());
          shoppingCartMapper.insert(shoppingCart);
      }



    }

    /**
     * 查看购物车
     * @return
     */
    public List<ShoppingCart> showShoppingCart() {
        //获取到当前微信用户的ID
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    /**
     * 清空购物车
     */
    public void cleanShoppingCart() {
        //获取当前用户ID
        Long userId = BaseContext.getCurrentId();
        shoppingCartMapper.deleteByUserId(userId);
    }
}
